Carbon black and method of producing same



AUGUSTO'E; CGO'JE'EY. 3F SAIXTTA BARBARA, CiaLIFURZIIA.

CAR BG 1 BILAGK All I) rimmed.

No Drawing.

To (17] 10/1022? if may roar/1m Be it known thatl. -liioiiwriin Elia-norm (ooricm a citizen of the l nited States, reside ing at Santa Barbara. in the eounty of Santa Barbara and State of California. have invented eertain new and useful ln'iprovements in ('arbon lllaek and Methods of Pro during SameQol whieh the iollmiiiig is a speeifieation.

This invention relates to the method of produeing earbon-blaek and to the produet itself and \rhieh is to be ultimately used in various industrial arts.

l einplo as the basis ol my proeess and For the raw material from whieh n1) eoznmereial. produet is produced brown frinble, bitumen whieh is a natural pro-duet t'oun'l intermixed with sand in eertain portions of (a1 i't'oru i a.

llrown friable bitumen has nerer before 1 \eful been employed commercially for any purpose. and It has been diseorered that t 1 1 snbstaiiee heretofore gei'ierzilly regarded of an Hardness of sand grain uw 7 bia-die gravity of ggrains 30 The inter-spares in these sands: are filled or partly filled with brown friable bitumen. in man ol the deposits; the oil eeinent that hohh the grains of Hilllil to ether is ihe brown friable bitumen. Tl adhesion ol' the brown friable bitumen to the sand grains; is not very strong. The brown friable bitumen inthe sand can be crushed between the fingers.

lardne ss ol the brown iriable bitumen, less than 1 Specific gravity h l to 1% -r- L Specueahon 01 Letters rateiit. Purl; jlffqfgl 5 Application. filed. January l 1922.

brown friable bitumen ha Serial l lo. 530,376.

(Ewing to the difference 5r the hardness between the sand and brown friable hitun'ien, and the slight adhesion of the brown friable bitumen to the grains of sand. it possible by crushing, impact and seonring the sand. that it ran be reduced to grain and the brown friable bitumen clisuniced from the Sand grains. and owing to the great differenee between the specific gravity of the sand and the speeifie gravity of the brown friable bitumen. the bitumen can be separated from the sand by air currents.

l'leretofore this brown friable bitumen was eonsidered of no value; thousands of tone were stripped from the viscous bitunienized sand that was used for paving); eta. and thrown on the waste dump. This 1a: her of disposing of the send been by calcining; brown friable bitumen.

3. The process of rn'edueing earbon-blaela insisting of sepa ailing natural brown friable bitumen from sand and finally eaiciniltfl the same.

l The method ol' inol'lueingj earl o1t=blael eonsisting of grinding; brown bitumen hearing i-2ill lt. blowing the bitumen therefrom. and heating; the finely eonm'iinuted bitumen thus obtained lorn'i earbon-b in testimony wlie-reol Ll AUGUSTUS STEIGER COUPEF.

brown friable bituineii. by the use of rind still my signature.

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